mintpy

[kazhal sobhani]

I used this dem to produce the interferogram. This is the dem that is ten meters long and I bought it from the mapping organization. Is there a problem in the process of time series processing or not

[kazhal sobhani]

Please answer my question🙏🙏🙏🙏🙏

‫‪kazhal sobhani‬‏ <‪kazhalso...@gmail.com‬‏> در تاریخ پنجشنبه ۲۴ اوت ۲۰۲۳ ساعت ۲۰:۰۳ نوشت:‬

I used this dem to produce the interferogram. This is the dem that is ten meters long and I bought it from the mapping organization. Is there a problem in the process of time series processing or not

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[Eric Fielding]

Hello Kazhal,

It looks like your custom DEM is a GeoTIFF file. Do you know what map projection it has?

Did you use the ISCE2 software to process your interferogram? The ISCE2 package may or may not work with a GeoTIFF DEM, but it can only handle DEMs in a "latitude-longitude" projection. 

You should post an image of your interferogram so that we can see if it looks like the InSAR processing was successful

I think MintPy can read a wide variety of DEMs, including GeoTIFF files, so the time-series part of the processing should work, if the InSAR processing was sucessful.

++Eric

[kazhal sobhani]

Yes, the dem I used is a geotiff file. The coordinate system is utm. I used Snap software to process the interferograms. Below the dem coordinate system is used and I have sent a sample of the generated interferogram.

‫‪'Eric Fielding' via MintPy‬‏ <‪min...@googlegroups.com‬‏> در تاریخ شنبه ۲۶ اوت ۲۰۲۳ ساعت ۷:۰۱ نوشت:‬

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[Eric Fielding]

Thanks for posting the details. Yes, I believe that the ESA SNAP software can use a custom DEM in UTM coordinates to process interferograms. It looks like your interferogram is processed successfully. The MintPy software has some support for interferograms processed with SNAP. You can see the MintPy template file for an example dataset processed with SNAP:
https://github.com/insarlab/MintPy/blob/main/docs/templates/WCapeSenAT29.txt

MintPy is designed to work on a stack of interferograms that form a time series, so you would need to process a set of interferograms over your study site with interconnected pairs to do the time-series analysis.

[Eric Fielding]

See the documentation page for more details on how to arrange the directories for working with SNAP data in MintPy:
https://mintpy.readthedocs.io/en/latest/dir_structure/#snap

[kazhal sobhani]

I also thank you. I have many other questions that may be very beginner for you, for example, after preparing the data.
1. What command should I use to create the text file?
2. These commands:
# vim: set filetype=cfg:
##-------------------------------- MintPy ---------------- --------------##
########## 1. Load Data (--load to exit after this step)
## load_data.py -H to check more details and example inputs.
mintpy.load.processor = snap
mintpy.load.unwFile = ../interferograms/*/*/Unw_*.img
mintpy.load.corFile = ../interferograms/*/*/coh_*.img
mintpy.load.demFile = ../dem*/dem*.img

mintpy.subset.lalo = -33.10:-32.95, 17.98:18.13
mintpy.reference.lalo = -33, 18.05

mintpy.networkInversion.weightFunc = var
mintpy.deramp = linear
mintpy.topographicResidual.pixelwiseGeometry = no
  should I let it run in the path of the text file that I create in the mintpy folder?

3. Should I execute all these commands together? I would be very grateful if you could guide me step by step. Because I really don't know how to execute the commands practically, while I have also read the mintpy tutorial😐.

‫‪'Eric Fielding' via MintPy‬‏ <‪min...@googlegroups.com‬‏> در تاریخ شنبه ۲۶ اوت ۲۰۲۳ ساعت ۱۹:۴۹ نوشت:‬

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[kazhal sobhani]

Hy everyone. I am going to run a sample data set. I downloaded the file and ran the command mintpy smallbaselineApp -g and then these commands
mintpy.load.processor = snap
##---------interferogram datasets:
mintpy.load.unwFile = $DATA_DIR/WCapeSenAT29/interferograms/*/*/Unw_*.img
mintpy.load.corFile = $DATA_DIR/WCapeSenAT29/interferograms/*/*/coh_*.img
##---------geometry datasets:
mintpy.load.demFile = $DATA_DIR/WCapeSenAT29/dem_tc.data/dem*.img
I ran it and it gives a message that it does not recognize the command. Now my question is, did I follow the procedure correctly or did I execute the wrong commands? Thank you in advance for your answer.